Visible Light Induced Cationic Polymerization of Epoxides by Using Multiwalled Carbon Nanotubes

Sangermano M., Rodriguez D., Gonzalez M. C. , Laurenti E., Yagci Y.

MACROMOLECULAR RAPID COMMUNICATIONS, cilt.39, sa.13, 2018 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 39 Konu: 13
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1002/marc.201800250
  • Dergi Adı: MACROMOLECULAR RAPID COMMUNICATIONS

Özet

The visible light induced cationic polymerization of epoxides can be achieved by means of multiwalled carbon nanotubes (MWCNTs), which act as visible light photoinitiators via a radical-induced cationic photopolymerization process. When MWCNTs are irradiated with longer wavelengths (above 400 nm), they generate carbon radicals, by means of hydrogen abstraction from the epoxy monomer; these radicals are oxidized in the presence of iodonium salt to a carbocation that is sufficiently reactive to start the cationic ring-opening polymerization of an epoxy monomer. These mechanisms have been supported by electron paramagnetic resonance analysis.